Vat coloring-matter.



UNITED STATES PATENT OFFICE;

JOSEPH DEINET, OF ELBERFELD, GERMALlY,.ASSIGNOR TO FARBENFABRIKEN VORMJ FRIEDR. BAYER & 00., OF ELBERFELD, GERMANY, A CORPORATION OF GERMANY.

VAT COLORING-MATTER.

938 619. Specification of Letters Patent. Patented NOV. 2, 1909;

' No Drawing. Application filed May 15, 1909. Serial No. 496,115.

To all whom it may concern: hydrosulfite and NaOH :1 brown-red. vatis Be it known that I, JOSEPH DEINET, citiobtained which dyes cot-ton, wool 01 silk zen of the German Empire, residing at orange-yellow shades. 2i Elberfeld, Germany, have invented new and I claim v useful Improvements in Vat' Coloring-Malt- The herein described new vat dyestufi of ter, of which the following is a specification. the unthracene series which is the LS-diben- My invention relates to the production of zoyldia ninoanthraqulnone, which dyestuil a new anthracene derivative. It is obtained is, after being dried and pulverized, an 30 by converting the 1.8-dieminoanthraquinone orange powder which/is soluble in pyridin into its dibenzoylated derivative. The reucwith an orange color; soluble in concen- ,tion is carried out by treating LS-diumino trated sulfuric acid with an orange-yellow anthraquln'one with benzoyl chlorid. color; giving a brown-red vat with hydro- Example: 10 parts of 1.8-d1un11n0- sulfite and caustic soda lye, which vat dyes 35 nntlu'aqninoneare heated to boiling for l the textile fiber orange-yellow shades, subabout half an hour with 100 parts of nitrol stantially as described.

benzene and 40 parts of benzoyl chlorid. In testimony whereof I have hereunto set The new condensation product crystallizes my hand in the presence of two subscribing .from the cooling liquid in the shape off; witnesses. 40 orange-crystals which are filtered 0d and l JOSEPH DEINET. [L s] dried. It is soluble in pyridin with a yellow Witnesses: color, in concentrated sulfuric acid with an OTTO KLiNIG, Y orange-yellow color. By treatment with p .G. J. WRIGHT. 

